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In-situ analysis of continuous cooling precipitation in Al alloys by wide-angle X-ray scattering
The aim of this work is to investigate quench induced precipitation during continuous coolingin aluminium wrought alloys EN AW-7150 and EN AW-6082 using in situ synchrotron wideangleX-ray scattering (WAXS). While X-ray diffraction is usually an ex situ method, a variety ofdiffraction patterns were recorded during the cooling process, allowing in situ analysis of theprecipitation process. The high beam energy of about 100 keV allows the beam to penetratea bulk sample with a 4 mm diameter in a quenching dilatometer. Additionally, the highintensity of a synchrotron source enables sufficiently high time resolution for fast in situ coolingexperiments. Reaction peaks could be detected and compared with results from differentialscanning calorimetry (DSC) by this method. A methodology is presented in this paper toevaluate WAXS data in a way that is directly comparable to DSC-experiments. The resultsshow a high correlation between both techniques, DSC and WAXS, and can significantlyimprove continuous cooling precipitation diagrams.
In-situ analysis of continuous cooling precipitation in Al alloys by wide-angle X-ray scattering
The aim of this work is to investigate quench induced precipitation during continuous coolingin aluminium wrought alloys EN AW-7150 and EN AW-6082 using in situ synchrotron wideangleX-ray scattering (WAXS). While X-ray diffraction is usually an ex situ method, a variety ofdiffraction patterns were recorded during the cooling process, allowing in situ analysis of theprecipitation process. The high beam energy of about 100 keV allows the beam to penetratea bulk sample with a 4 mm diameter in a quenching dilatometer. Additionally, the highintensity of a synchrotron source enables sufficiently high time resolution for fast in situ coolingexperiments. Reaction peaks could be detected and compared with results from differentialscanning calorimetry (DSC) by this method. A methodology is presented in this paper toevaluate WAXS data in a way that is directly comparable to DSC-experiments. The resultsshow a high correlation between both techniques, DSC and WAXS, and can significantlyimprove continuous cooling precipitation diagrams.
In-situ analysis of continuous cooling precipitation in Al alloys by wide-angle X-ray scattering
Rowolt, Christian (Autor:in) / Fröck, Hannes (Autor:in) / Milkereit, Benjamin (Autor:in) / Reich, Michael (Autor:in) / Kowalski, Wolfgang (Autor:in) / Stark, Andreas (Autor:in) / Keßler, Olaf (Autor:in)
01.01.2020
Science and technology of advanced materials 21(1), 205 - 218 (2020). doi:10.1080/14686996.2020.1739554
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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